I recently took off my k&n cone filter noff my 99 Jeep TJ with the 2.5L because I read they don't filter very well. I put my stock air box on and was wondering what other jeep owners use in their wrangler TJ's? I put an AC delco in yesterday and really haven't noticed a performance drop from the k&N.
best drop in filter
- Thread starter wn1998
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A few years ago Baldwin Filters were the hot Item on this board. Have not heard much on the Baldwin's in the last few months. There seems to a move toward the NAPA's Top of the line air filters.
I use a factory OEM filter in my car. I too swapped out the K&N in my car for a factory paper filter.
Try using the search function for "Airfilters" you should be able to get your question answered quickly.
I use a factory OEM filter in my car. I too swapped out the K&N in my car for a factory paper filter.
Try using the search function for "Airfilters" you should be able to get your question answered quickly.
I use Napa Gold in my Cherokee.
Most tests seen on this forum show the AC Delco being the best at filtration.
Loaded question.
I use Wix/Napa Golds. But I would have no problem using Baldwins/AC Delcos. I'm actually impressed with the stats I've seen on the Delco filters.
what are the differences napa top of line and bottom of line?
I'd be interested in this answer as I am running a NAPA Gold in my Sentra 2.5L It is of good construction but isn't too restrictive. I'd switch to Baldwin if I knew it was significantly better?
After driving my jeep 2.5L, around with the AC Delco Drop in air filter I am convinced that 99% of cars don't get much from a "high flow" air filter. My jeep has 31 inch tires, and is probably one of the slowest cars off the line so I have done just about all of the bolt on mods to increase hp to get down the road. My 1st tank of gave gave me the exact same mileage I got with the K&N cone and I have not noticed any power loss over the K&N Cone Filter. My advice would be to find the filter that does the best at what it's supposed to do "filter" the air.
If i was going to use paper i would use Ac Delco or Baldwin. But, i dont. I am one of the cotton guaze users. Although some independant tests show these filters to be slightly less effective in filtration, I dont beleive it to be true. These filters, if oiled correctly filter at equal filtration levels as many paper filters. I know many who have had Cotton guaze filters in there cars for 100k+ with no reported problems, clean intakes and throttle bodies, and overall excellent performance.
I always like to take into account that these cotton filters with there rubber seals seat much better then the majority of paper air filters, and the cotton filters are of top notch construction. The chance of a tear, rip, or defect in the filter is much less with these filters as they are built to stay in your air box much longer and you can see and feel the quality difference. I have seen many independant lab studies from K&N showing great effiecency levels in the 98%-99% for fine dust which is almost identical to paper filters. I trust these independent tests. I have also seen independant tests that really show variances in cotton and paper, which i tend not to believe based on what i have seen and heard outside a computer screen, as no one i have ever spoken to has ever really had any problem with cotton filters, and have high miles on there filters and engines.
My recommendation is a cotton guaze filter. (Air box replacement only)
(Please, this is my opinion, and i am aware of other posters opinions about cotton vs. paper, please do not start a huge debate as it can be read in many other threads.)
I always like to take into account that these cotton filters with there rubber seals seat much better then the majority of paper air filters, and the cotton filters are of top notch construction. The chance of a tear, rip, or defect in the filter is much less with these filters as they are built to stay in your air box much longer and you can see and feel the quality difference. I have seen many independant lab studies from K&N showing great effiecency levels in the 98%-99% for fine dust which is almost identical to paper filters. I trust these independent tests. I have also seen independant tests that really show variances in cotton and paper, which i tend not to believe based on what i have seen and heard outside a computer screen, as no one i have ever spoken to has ever really had any problem with cotton filters, and have high miles on there filters and engines.
My recommendation is a cotton guaze filter. (Air box replacement only)
(Please, this is my opinion, and i am aware of other posters opinions about cotton vs. paper, please do not start a huge debate as it can be read in many other threads.)
Ive always used purolator air and oil, but am starting to get curious about the napa gold stuff.
Exclusive Long term WIX* user here !!
K&N is expensive Snake Oil
K&N is expensive Snake Oil
RedWolf4000
"I have seen many independant lab studies from K&N showing great effiecency levels in the 98%-99% for fine dust which is almost identical to paper filters."
What they are showing is the end of the test when all of the filters are loaded up and beginning to fail.
What they don't show is the beginning of the test and the amount of dirt/dust that passes through the K&N which if I remember correctly is about 75%. At the beginning of the same test a foam and paper let through some dirt/dust also but only about 1-2%.
K&N spins the test to sell filters to the unspecting.
Amsoil does the same by promoting the end of the test where they are flowing more air than the paper or K&N.
From start to finish a high quality paper filter is the best to use for everyday driving.
"I have seen many independant lab studies from K&N showing great effiecency levels in the 98%-99% for fine dust which is almost identical to paper filters."
What they are showing is the end of the test when all of the filters are loaded up and beginning to fail.
What they don't show is the beginning of the test and the amount of dirt/dust that passes through the K&N which if I remember correctly is about 75%. At the beginning of the same test a foam and paper let through some dirt/dust also but only about 1-2%.
K&N spins the test to sell filters to the unspecting.
Amsoil does the same by promoting the end of the test where they are flowing more air than the paper or K&N.
From start to finish a high quality paper filter is the best to use for everyday driving.
THAT my friend, i was unaware of. Am i the victim of a marketing scandal? LoL.
I never threw away my Ac Delco paper filter, its in the garage, only 10k on it...
I still dont see Huge proof that K&N types are that bad, but some Winter tests are starting to get to me.
Look what this site does to me! I dont like going back on my decisions and words. but it seems the Ac Delco paper is going to give me that good extended drain test results huh.
Besides, i do have a 1987 toyota 4x4 with 400k+ on the block, and 10k drain intervals with M1, and all i ever used was paper, so i guess it makes sense to stick with what works right?
If it aint broke, dont try to fix it.
After much debate, and everyone hard work, they just turned a New Fram Air Hog customer (me) into an Old Paper user again.
Thanks for not lossing faith in me! LoL.
AcDelco here i come.
I never threw away my Ac Delco paper filter, its in the garage, only 10k on it...
I still dont see Huge proof that K&N types are that bad, but some Winter tests are starting to get to me.
Look what this site does to me! I dont like going back on my decisions and words. but it seems the Ac Delco paper is going to give me that good extended drain test results huh.
Besides, i do have a 1987 toyota 4x4 with 400k+ on the block, and 10k drain intervals with M1, and all i ever used was paper, so i guess it makes sense to stick with what works right?
If it aint broke, dont try to fix it.
After much debate, and everyone hard work, they just turned a New Fram Air Hog customer (me) into an Old Paper user again.
Thanks for not lossing faith in me! LoL.
AcDelco here i come.
Some guys on LS1.com use a Fram air filter on their big inch LS1s, and dyno the same or MORE than with a K&N. That's proof enough for me
baldwin was good when i tried it.
but if u want them, then get ur filter and size it next to baldwins...
on my design model the filter of baldwins was much smaller sealing area so it didnt seal but gosh u can tell teh quality is great!
but if u want them, then get ur filter and size it next to baldwins...
on my design model the filter of baldwins was much smaller sealing area so it didnt seal but gosh u can tell teh quality is great!
I had 2 UOA`s using a K&N air filter.The 1st UOA at 6300 miles showed 35 PPM of silicon,the air cleaner was still pretty clean . The 2nd UOA at 17000 miles showed 17 PPM of silicon,the air cleaner was starting to get some dirt on it and actually filter.Maybe someone should invent a can of SPRAY ON DIRT,LOL.Got rid of the K&N and went back to paper.
I've always been partial to AC Delco, but I've got Frams on both cars now. As long as the filter seals, I can't imagine there being a drastic difference in air filters between brands.
I agree. As we see in UOA's, the main issue is getting whatever brand filter to seal properly.
If it can do that, then you'll be a-ok with Fram, Purolator, etc, etc, etc...
Thats the thing, the AC Delcos i get form ym dealer, that come stock with my car fit SO SNUG. Its actually a bit tough to get them in because they seem a tad bit bigger, and the seal overkills around a 10mm more then the other brands that i had picked up in autozone, it almost seems like they really took a good look at my airbox....maybe they did, they are the OEM provider after all.
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